// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
#ifndef __FINDER_PATTERN_FINDER_H__
#define __FINDER_PATTERN_FINDER_H__

/*
 *  FinderPatternFinder.h
 *  zxing
 *
 *  Copyright 2010 ZXing authors All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <zxing/qrcode/detector/FinderPattern.h>
#include <zxing/qrcode/detector/FinderPatternInfo.h>
#include <zxing/common/Counted.h>
#include <zxing/common/BitMatrix.h>
#include <zxing/ResultPointCallback.h>
#include <vector>

namespace zxing {

    class DecodeHints;

    namespace qrcode {

        class FinderPatternFinder {
        private:
            static int CENTER_QUORUM;

        protected:
            static int MIN_SKIP;
            static int MAX_MODULES;

            Ref<BitMatrix> image_;
            std::vector<Ref<FinderPattern> > possibleCenters_;
            bool hasSkipped_;

            Ref<ResultPointCallback> callback_;

            /** stateCount must be int[5] */
            static float centerFromEnd(int *stateCount, int end);

            static bool foundPatternCross(int *stateCount);

            float crossCheckVertical(size_t startI, size_t centerJ, int maxCount,
                                     int originalStateCountTotal);

            float crossCheckHorizontal(size_t startJ, size_t centerI, int maxCount,
                                       int originalStateCountTotal);

            /** stateCount must be int[5] */
            bool handlePossibleCenter(int *stateCount, size_t i, size_t j);

            int findRowSkip();

            bool haveMultiplyConfirmedCenters();

            std::vector<Ref<FinderPattern> > selectBestPatterns();

            static std::vector<Ref<FinderPattern> > orderBestPatterns(
                    std::vector<Ref<FinderPattern> > patterns);

            Ref<BitMatrix> getImage();

            std::vector<Ref<FinderPattern> > &getPossibleCenters();

        public:
            static float distance(Ref<ResultPoint> p1, Ref<ResultPoint> p2);

            FinderPatternFinder(Ref<BitMatrix> image, Ref<ResultPointCallback> const &);

            Ref<FinderPatternInfo> find(DecodeHints const &hints);
        };
    }
}

#endif // __FINDER_PATTERN_FINDER_H__
